Question

....... and ....... demagnetise a magnet

Answer 1

Change the Magnet with High Heat. ...

Place the Magnet in a Reverse Field. ...

Hammer the Magnet. ...

Leave the Magnet Alone for a (Very) Long Time.

Answer 2

Heya,

__Heating__ and __Passing excessive AC current__ demagnetise a magnet.

HOPE IT HELPS:-))